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<h1 class="title">dialog.cpp 示例文件</h1>
<span class="subtitle">layouts/dynamiclayouts/dialog.cpp</span>
<!-- $$$layouts/dynamiclayouts/dialog.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
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  ** $QT_BEGIN_LICENSE:BSD$
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  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
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  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** &quot;Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
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  <span class="preprocessor">#include &lt;QtWidgets&gt;</span>

  <span class="preprocessor">#include &quot;dialog.h&quot;</span>

  Dialog<span class="operator">::</span>Dialog(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
      : <span class="type"><a href="qdialog.html">QDialog</a></span>(parent)
  {
      createRotatableGroupBox();
      createOptionsGroupBox();
      createButtonBox();

      mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(rotatableGroupBox<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(optionsGroupBox<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>);
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(buttonBox<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>);
      setLayout(mainLayout);

      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>setSizeConstraint(<span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>SetMinimumSize);

      setWindowTitle(tr(<span class="string">&quot;Dynamic Layouts&quot;</span>));
  }

  <span class="type">void</span> Dialog<span class="operator">::</span>buttonsOrientationChanged(<span class="type">int</span> index)
  {
      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>setSizeConstraint(<span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>SetNoConstraint);
      setMinimumSize(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);

      <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Orientation orientation <span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Orientation(
              buttonsOrientationComboBox<span class="operator">-</span><span class="operator">&gt;</span>itemData(index)<span class="operator">.</span>toInt());

      <span class="keyword">if</span> (orientation <span class="operator">=</span><span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">&gt;</span>orientation())
          <span class="keyword">return</span>;

      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>removeWidget(buttonBox);

      <span class="type">int</span> spacing <span class="operator">=</span> mainLayout<span class="operator">-</span><span class="operator">&gt;</span>spacing();

      <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> oldSizeHint <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">&gt;</span>sizeHint() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(spacing<span class="operator">,</span> spacing);
      buttonBox<span class="operator">-</span><span class="operator">&gt;</span>setOrientation(orientation);
      <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> newSizeHint <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">&gt;</span>sizeHint() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(spacing<span class="operator">,</span> spacing);

      <span class="keyword">if</span> (orientation <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal) {
          mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(buttonBox<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>);
          resize(size() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(<span class="operator">-</span>oldSizeHint<span class="operator">.</span>width()<span class="operator">,</span> newSizeHint<span class="operator">.</span>height()));
      } <span class="keyword">else</span> {
          mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(buttonBox<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>);
          resize(size() <span class="operator">+</span> <span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(newSizeHint<span class="operator">.</span>width()<span class="operator">,</span> <span class="operator">-</span>oldSizeHint<span class="operator">.</span>height()));
      }

      mainLayout<span class="operator">-</span><span class="operator">&gt;</span>setSizeConstraint(<span class="type"><a href="qlayout.html">QLayout</a></span><span class="operator">::</span>SetDefaultConstraint);
  }

  <span class="type">void</span> Dialog<span class="operator">::</span>rotateWidgets()
  {
      Q_ASSERT(rotatableWidgets<span class="operator">.</span>count() <span class="operator">%</span> <span class="number">2</span> <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>);

      foreach (<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget<span class="operator">,</span> rotatableWidgets)
          rotatableLayout<span class="operator">-</span><span class="operator">&gt;</span>removeWidget(widget);

      rotatableWidgets<span class="operator">.</span>enqueue(rotatableWidgets<span class="operator">.</span>dequeue());

      <span class="keyword">const</span> <span class="type">int</span> n <span class="operator">=</span> rotatableWidgets<span class="operator">.</span>count();
      <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> n <span class="operator">/</span> <span class="number">2</span>; <span class="operator">+</span><span class="operator">+</span>i) {
          rotatableLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(rotatableWidgets<span class="operator">[</span>n <span class="operator">-</span> i <span class="operator">-</span> <span class="number">1</span><span class="operator">]</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> i);
          rotatableLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(rotatableWidgets<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> i);
      }
  }

  <span class="type">void</span> Dialog<span class="operator">::</span>help()
  {
      <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Dynamic Layouts Help&quot;</span>)<span class="operator">,</span>
                                 tr(<span class="string">&quot;This example shows how to change layouts &quot;</span>
                                    <span class="string">&quot;dynamically.&quot;</span>));
  }

  <span class="type">void</span> Dialog<span class="operator">::</span>createRotatableGroupBox()
  {
      rotatableGroupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(tr(<span class="string">&quot;Rotatable Widgets&quot;</span>));

      rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qspinbox.html">QSpinBox</a></span>);
      rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>);
      rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qdial.html">QDial</a></span>);
      rotatableWidgets<span class="operator">.</span>enqueue(<span class="keyword">new</span> <span class="type"><a href="qprogressbar.html">QProgressBar</a></span>);

      <span class="type">int</span> n <span class="operator">=</span> rotatableWidgets<span class="operator">.</span>count();
      <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> n; <span class="operator">+</span><span class="operator">+</span>i) {
          connect(rotatableWidgets<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span>
                  rotatableWidgets<span class="operator">[</span>(i <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> n<span class="operator">]</span><span class="operator">,</span> SLOT(setValue(<span class="type">int</span>)));
      }

      rotatableLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
      rotatableGroupBox<span class="operator">-</span><span class="operator">&gt;</span>setLayout(rotatableLayout);

      rotateWidgets();
  }

  <span class="type">void</span> Dialog<span class="operator">::</span>createOptionsGroupBox()
  {
      optionsGroupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(tr(<span class="string">&quot;Options&quot;</span>));

      buttonsOrientationLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Orientation of buttons:&quot;</span>));

      buttonsOrientationComboBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcombobox.html">QComboBox</a></span>;
      buttonsOrientationComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Horizontal&quot;</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal);
      buttonsOrientationComboBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Vertical&quot;</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Vertical);

      connect(buttonsOrientationComboBox<span class="operator">,</span>
              <span class="type">QOverload</span><span class="operator">&lt;</span><span class="type">int</span><span class="operator">&gt;</span><span class="operator">::</span>of(<span class="operator">&amp;</span><span class="type"><a href="qcombobox.html">QComboBox</a></span><span class="operator">::</span>currentIndexChanged)<span class="operator">,</span>
              <span class="keyword">this</span><span class="operator">,</span>
              <span class="operator">&amp;</span>Dialog<span class="operator">::</span>buttonsOrientationChanged);

      optionsLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
      optionsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(buttonsOrientationLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
      optionsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(buttonsOrientationComboBox<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>);
      optionsLayout<span class="operator">-</span><span class="operator">&gt;</span>setColumnStretch(<span class="number">2</span><span class="operator">,</span> <span class="number">1</span>);
      optionsGroupBox<span class="operator">-</span><span class="operator">&gt;</span>setLayout(optionsLayout);
  }

  <span class="type">void</span> Dialog<span class="operator">::</span>createButtonBox()
  {
      buttonBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span>;

      closeButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">&gt;</span>addButton(<span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>Close);
      helpButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">&gt;</span>addButton(<span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>Help);
      rotateWidgetsButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">&gt;</span>addButton(tr(<span class="string">&quot;Rotate &amp;Widgets&quot;</span>)<span class="operator">,</span>
                                                 <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>ActionRole);

      connect(rotateWidgetsButton<span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>Dialog<span class="operator">::</span>rotateWidgets);
      connect(closeButton<span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>Dialog<span class="operator">::</span>close);
      connect(helpButton<span class="operator">,</span> <span class="operator">&amp;</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>Dialog<span class="operator">::</span>help);
  }

</pre>
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<!-- @@@layouts/dynamiclayouts/dialog.cpp -->
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